72043509 has 8 divisors (see below), whose sum is σ = 96190272. Its totient is φ = 47962880.

The previous prime is 72043507. The next prime is 72043513. The reversal of 72043509 is 90534027.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72043509 - 2¹ = 72043507 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72043507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13932 + ... + 18389.

It is an arithmetic number, because the mean of its divisors is an integer number (12023784).

Almost surely, 2^72043509 is an apocalyptic number.

It is an amenable number.

72043509 is a deficient number, since it is larger than the sum of its proper divisors (24146763).

72043509 is a wasteful number, since it uses less digits than its factorization.

72043509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33067.

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 72043509 is about 8487.8447794478. The cubic root of 72043509 is about 416.1005462245.

The spelling of 72043509 in words is "seventy-two million, forty-three thousand, five hundred nine".